src/test/test-fs-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <unistd.h>
   4
   5 #include "alloc-util.h"
   6 #include "fd-util.h"
   7 #include "fs-util.h"
   8 #include "id128-util.h"
   9 #include "macro.h"
  10 #include "mkdir.h"
  11 #include "path-util.h"
  12 #include "rm-rf.h"
  13 #include "stdio-util.h"
  14 #include "string-util.h"
  15 #include "strv.h"
  16 #include "tests.h"
  17 #include "tmpfile-util.h"
  18 #include "umask-util.h"
  19 #include "user-util.h"
  20 #include "util.h"
  21 #include "virt.h"
  22
  23 static const char *arg_test_dir = NULL;
  24
  25 static void test_chase_symlinks(void) {
  26         _cleanup_free_ char *result = NULL;
  27         char *temp;
  28         const char *top, *p, *pslash, *q, *qslash;
  29         struct stat st;
  30         int r, pfd;
  31
  32         log_info("/* %s */", __func__);
  33
  34         temp = strjoina(arg_test_dir ?: "/tmp", "/test-chase.XXXXXX");
  35         assert_se(mkdtemp(temp));
  36
  37         top = strjoina(temp, "/top");
  38         assert_se(mkdir(top, 0700) >= 0);
  39
  40         p = strjoina(top, "/dot");
  41         if (symlink(".", p) < 0) {
  42                 assert_se(IN_SET(errno, EINVAL, ENOSYS, ENOTTY, EPERM));
  43                 log_tests_skipped_errno(errno, "symlink() not possible");
  44                 goto cleanup;
  45         };
  46
  47         p = strjoina(top, "/dotdot");
  48         assert_se(symlink("..", p) >= 0);
  49
  50         p = strjoina(top, "/dotdota");
  51         assert_se(symlink("../a", p) >= 0);
  52
  53         p = strjoina(temp, "/a");
  54         assert_se(symlink("b", p) >= 0);
  55
  56         p = strjoina(temp, "/b");
  57         assert_se(symlink("/usr", p) >= 0);
  58
  59         p = strjoina(temp, "/start");
  60         assert_se(symlink("top/dot/dotdota", p) >= 0);
  61
  62         /* Paths that use symlinks underneath the "root" */
  63
  64         r = chase_symlinks(p, NULL, 0, &result);
  65         assert_se(r > 0);
  66         assert_se(path_equal(result, "/usr"));
  67         result = mfree(result);
  68
  69         pslash = strjoina(p, "/");
  70         r = chase_symlinks(pslash, NULL, 0, &result);
  71         assert_se(r > 0);
  72         assert_se(path_equal(result, "/usr/"));
  73         result = mfree(result);
  74
  75         r = chase_symlinks(p, temp, 0, &result);
  76         assert_se(r == -ENOENT);
  77
  78         r = chase_symlinks(pslash, temp, 0, &result);
  79         assert_se(r == -ENOENT);
  80
  81         q = strjoina(temp, "/usr");
  82
  83         r = chase_symlinks(p, temp, CHASE_NONEXISTENT, &result);
  84         assert_se(r == 0);
  85         assert_se(path_equal(result, q));
  86         result = mfree(result);
  87
  88         qslash = strjoina(q, "/");
  89
  90         r = chase_symlinks(pslash, temp, CHASE_NONEXISTENT, &result);
  91         assert_se(r == 0);
  92         assert_se(path_equal(result, qslash));
  93         result = mfree(result);
  94
  95         assert_se(mkdir(q, 0700) >= 0);
  96
  97         r = chase_symlinks(p, temp, 0, &result);
  98         assert_se(r > 0);
  99         assert_se(path_equal(result, q));
 100         result = mfree(result);
 101
 102         r = chase_symlinks(pslash, temp, 0, &result);
 103         assert_se(r > 0);
 104         assert_se(path_equal(result, qslash));
 105         result = mfree(result);
 106
 107         p = strjoina(temp, "/slash");
 108         assert_se(symlink("/", p) >= 0);
 109
 110         r = chase_symlinks(p, NULL, 0, &result);
 111         assert_se(r > 0);
 112         assert_se(path_equal(result, "/"));
 113         result = mfree(result);
 114
 115         r = chase_symlinks(p, temp, 0, &result);
 116         assert_se(r > 0);
 117         assert_se(path_equal(result, temp));
 118         result = mfree(result);
 119
 120         /* Paths that would "escape" outside of the "root" */
 121
 122         p = strjoina(temp, "/6dots");
 123         assert_se(symlink("../../..", p) >= 0);
 124
 125         r = chase_symlinks(p, temp, 0, &result);
 126         assert_se(r > 0 && path_equal(result, temp));
 127         result = mfree(result);
 128
 129         p = strjoina(temp, "/6dotsusr");
 130         assert_se(symlink("../../../usr", p) >= 0);
 131
 132         r = chase_symlinks(p, temp, 0, &result);
 133         assert_se(r > 0 && path_equal(result, q));
 134         result = mfree(result);
 135
 136         p = strjoina(temp, "/top/8dotsusr");
 137         assert_se(symlink("../../../../usr", p) >= 0);
 138
 139         r = chase_symlinks(p, temp, 0, &result);
 140         assert_se(r > 0 && path_equal(result, q));
 141         result = mfree(result);
 142
 143         /* Paths that contain repeated slashes */
 144
 145         p = strjoina(temp, "/slashslash");
 146         assert_se(symlink("///usr///", p) >= 0);
 147
 148         r = chase_symlinks(p, NULL, 0, &result);
 149         assert_se(r > 0);
 150         assert_se(path_equal(result, "/usr"));
 151         result = mfree(result);
 152
 153         r = chase_symlinks(p, temp, 0, &result);
 154         assert_se(r > 0);
 155         assert_se(path_equal(result, q));
 156         result = mfree(result);
 157
 158         /* Paths underneath the "root" with different UIDs while using CHASE_SAFE */
 159
 160         if (geteuid() == 0) {
 161                 p = strjoina(temp, "/user");
 162                 assert_se(mkdir(p, 0755) >= 0);
 163                 assert_se(chown(p, UID_NOBODY, GID_NOBODY) >= 0);
 164
 165                 q = strjoina(temp, "/user/root");
 166                 assert_se(mkdir(q, 0755) >= 0);
 167
 168                 p = strjoina(q, "/link");
 169                 assert_se(symlink("/", p) >= 0);
 170
 171                 /* Fail when user-owned directories contain root-owned subdirectories. */
 172                 r = chase_symlinks(p, temp, CHASE_SAFE, &result);
 173                 assert_se(r == -ENOLINK);
 174                 result = mfree(result);
 175
 176                 /* Allow this when the user-owned directories are all in the "root". */
 177                 r = chase_symlinks(p, q, CHASE_SAFE, &result);
 178                 assert_se(r > 0);
 179                 result = mfree(result);
 180         }
 181
 182         /* Paths using . */
 183
 184         r = chase_symlinks("/etc/./.././", NULL, 0, &result);
 185         assert_se(r > 0);
 186         assert_se(path_equal(result, "/"));
 187         result = mfree(result);
 188
 189         r = chase_symlinks("/etc/./.././", "/etc", 0, &result);
 190         assert_se(r > 0 && path_equal(result, "/etc"));
 191         result = mfree(result);
 192
 193         r = chase_symlinks("/../.././//../../etc", NULL, 0, &result);
 194         assert_se(r > 0);
 195         assert_se(streq(result, "/etc"));
 196         result = mfree(result);
 197
 198         r = chase_symlinks("/../.././//../../test-chase.fsldajfl", NULL, CHASE_NONEXISTENT, &result);
 199         assert_se(r == 0);
 200         assert_se(streq(result, "/test-chase.fsldajfl"));
 201         result = mfree(result);
 202
 203         r = chase_symlinks("/../.././//../../etc", "/", CHASE_PREFIX_ROOT, &result);
 204         assert_se(r > 0);
 205         assert_se(streq(result, "/etc"));
 206         result = mfree(result);
 207
 208         r = chase_symlinks("/../.././//../../test-chase.fsldajfl", "/", CHASE_PREFIX_ROOT|CHASE_NONEXISTENT, &result);
 209         assert_se(r == 0);
 210         assert_se(streq(result, "/test-chase.fsldajfl"));
 211         result = mfree(result);
 212
 213         r = chase_symlinks("/etc/machine-id/foo", NULL, 0, &result);
 214         assert_se(r == -ENOTDIR);
 215         result = mfree(result);
 216
 217         /* Path that loops back to self */
 218
 219         p = strjoina(temp, "/recursive-symlink");
 220         assert_se(symlink("recursive-symlink", p) >= 0);
 221         r = chase_symlinks(p, NULL, 0, &result);
 222         assert_se(r == -ELOOP);
 223
 224         /* Path which doesn't exist */
 225
 226         p = strjoina(temp, "/idontexist");
 227         r = chase_symlinks(p, NULL, 0, &result);
 228         assert_se(r == -ENOENT);
 229
 230         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result);
 231         assert_se(r == 0);
 232         assert_se(path_equal(result, p));
 233         result = mfree(result);
 234
 235         p = strjoina(temp, "/idontexist/meneither");
 236         r = chase_symlinks(p, NULL, 0, &result);
 237         assert_se(r == -ENOENT);
 238
 239         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result);
 240         assert_se(r == 0);
 241         assert_se(path_equal(result, p));
 242         result = mfree(result);
 243
 244         /* Path which doesn't exist, but contains weird stuff */
 245
 246         p = strjoina(temp, "/idontexist/..");
 247         r = chase_symlinks(p, NULL, 0, &result);
 248         assert_se(r == -ENOENT);
 249
 250         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result);
 251         assert_se(r == -ENOENT);
 252
 253         p = strjoina(temp, "/target");
 254         q = strjoina(temp, "/top");
 255         assert_se(symlink(q, p) >= 0);
 256         p = strjoina(temp, "/target/idontexist");
 257         r = chase_symlinks(p, NULL, 0, &result);
 258         assert_se(r == -ENOENT);
 259
 260         if (geteuid() == 0) {
 261                 p = strjoina(temp, "/priv1");
 262                 assert_se(mkdir(p, 0755) >= 0);
 263
 264                 q = strjoina(p, "/priv2");
 265                 assert_se(mkdir(q, 0755) >= 0);
 266
 267                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) >= 0);
 268
 269                 assert_se(chown(q, UID_NOBODY, GID_NOBODY) >= 0);
 270                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) >= 0);
 271
 272                 assert_se(chown(p, UID_NOBODY, GID_NOBODY) >= 0);
 273                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) >= 0);
 274
 275                 assert_se(chown(q, 0, 0) >= 0);
 276                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) == -ENOLINK);
 277
 278                 assert_se(rmdir(q) >= 0);
 279                 assert_se(symlink("/etc/passwd", q) >= 0);
 280                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) == -ENOLINK);
 281
 282                 assert_se(chown(p, 0, 0) >= 0);
 283                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL) >= 0);
 284         }
 285
 286         p = strjoina(temp, "/machine-id-test");
 287         assert_se(symlink("/usr/../etc/./machine-id", p) >= 0);
 288
 289         pfd = chase_symlinks(p, NULL, CHASE_OPEN, NULL);
 290         if (pfd != -ENOENT) {
 291                 _cleanup_close_ int fd = -1;
 292                 sd_id128_t a, b;
 293
 294                 assert_se(pfd >= 0);
 295
 296                 fd = fd_reopen(pfd, O_RDONLY|O_CLOEXEC);
 297                 assert_se(fd >= 0);
 298                 safe_close(pfd);
 299
 300                 assert_se(id128_read_fd(fd, ID128_PLAIN, &a) >= 0);
 301                 assert_se(sd_id128_get_machine(&b) >= 0);
 302                 assert_se(sd_id128_equal(a, b));
 303         }
 304
 305         /* Test CHASE_NOFOLLOW */
 306
 307         p = strjoina(temp, "/target");
 308         q = strjoina(temp, "/symlink");
 309         assert_se(symlink(p, q) >= 0);
 310         pfd = chase_symlinks(q, NULL, CHASE_OPEN|CHASE_NOFOLLOW, &result);
 311         assert_se(pfd > 0);
 312         assert_se(path_equal(result, q));
 313         assert_se(fstat(pfd, &st) >= 0);
 314         assert_se(S_ISLNK(st.st_mode));
 315         result = mfree(result);
 316
 317         /* s1 -> s2 -> nonexistent */
 318         q = strjoina(temp, "/s1");
 319         assert_se(symlink("s2", q) >= 0);
 320         p = strjoina(temp, "/s2");
 321         assert_se(symlink("nonexistent", p) >= 0);
 322         pfd = chase_symlinks(q, NULL, CHASE_OPEN|CHASE_NOFOLLOW, &result);
 323         assert_se(pfd > 0);
 324         assert_se(path_equal(result, q));
 325         assert_se(fstat(pfd, &st) >= 0);
 326         assert_se(S_ISLNK(st.st_mode));
 327         result = mfree(result);
 328
 329         /* Test CHASE_ONE */
 330
 331         p = strjoina(temp, "/start");
 332         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 333         assert_se(r == 0);
 334         p = strjoina(temp, "/top/dot/dotdota");
 335         assert_se(streq(p, result));
 336         result = mfree(result);
 337
 338         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 339         assert_se(r == 0);
 340         p = strjoina(temp, "/top/./dotdota");
 341         assert_se(streq(p, result));
 342         result = mfree(result);
 343
 344         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 345         assert_se(r == 0);
 346         p = strjoina(temp, "/top/../a");
 347         assert_se(streq(p, result));
 348         result = mfree(result);
 349
 350         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 351         assert_se(r == 0);
 352         p = strjoina(temp, "/a");
 353         assert_se(streq(p, result));
 354         result = mfree(result);
 355
 356         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 357         assert_se(r == 0);
 358         p = strjoina(temp, "/b");
 359         assert_se(streq(p, result));
 360         result = mfree(result);
 361
 362         r = chase_symlinks(p, NULL, CHASE_STEP, &result);
 363         assert_se(r == 0);
 364         assert_se(streq("/usr", result));
 365         result = mfree(result);
 366
 367         r = chase_symlinks("/usr", NULL, CHASE_STEP, &result);
 368         assert_se(r > 0);
 369         assert_se(streq("/usr", result));
 370         result = mfree(result);
 371
 372  cleanup:
 373         assert_se(rm_rf(temp, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
 374 }
 375
 376 static void test_unlink_noerrno(void) {
 377         char *name;
 378         int fd;
 379
 380         log_info("/* %s */", __func__);
 381
 382         name = strjoina(arg_test_dir ?: "/tmp", "/test-close_nointr.XXXXXX");
 383         fd = mkostemp_safe(name);
 384         assert_se(fd >= 0);
 385         assert_se(close_nointr(fd) >= 0);
 386
 387         {
 388                 PROTECT_ERRNO;
 389                 errno = 42;
 390                 assert_se(unlink_noerrno(name) >= 0);
 391                 assert_se(errno == 42);
 392                 assert_se(unlink_noerrno(name) < 0);
 393                 assert_se(errno == 42);
 394         }
 395 }
 396
 397 static void test_readlink_and_make_absolute(void) {
 398         const char *tempdir, *name, *name2, *name_alias;
 399         _cleanup_free_ char *r1 = NULL, *r2 = NULL, *pwd = NULL;
 400
 401         log_info("/* %s */", __func__);
 402
 403         tempdir = strjoina(arg_test_dir ?: "/tmp", "/test-readlink_and_make_absolute");
 404         name = strjoina(tempdir, "/original");
 405         name2 = "test-readlink_and_make_absolute/original";
 406         name_alias = strjoina(arg_test_dir ?: "/tmp", "/test-readlink_and_make_absolute-alias");
 407
 408         assert_se(mkdir_safe(tempdir, 0755, getuid(), getgid(), MKDIR_WARN_MODE) >= 0);
 409         assert_se(touch(name) >= 0);
 410
 411         if (symlink(name, name_alias) < 0) {
 412                 assert_se(IN_SET(errno, EINVAL, ENOSYS, ENOTTY, EPERM));
 413                 log_tests_skipped_errno(errno, "symlink() not possible");
 414         } else {
 415                 assert_se(readlink_and_make_absolute(name_alias, &r1) >= 0);
 416                 assert_se(streq(r1, name));
 417                 assert_se(unlink(name_alias) >= 0);
 418
 419                 assert_se(safe_getcwd(&pwd) >= 0);
 420
 421                 assert_se(chdir(tempdir) >= 0);
 422                 assert_se(symlink(name2, name_alias) >= 0);
 423                 assert_se(readlink_and_make_absolute(name_alias, &r2) >= 0);
 424                 assert_se(streq(r2, name));
 425                 assert_se(unlink(name_alias) >= 0);
 426
 427                 assert_se(chdir(pwd) >= 0);
 428         }
 429
 430         assert_se(rm_rf(tempdir, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
 431 }
 432
 433 static void test_get_files_in_directory(void) {
 434         _cleanup_strv_free_ char **l = NULL, **t = NULL;
 435
 436         assert_se(get_files_in_directory(arg_test_dir ?: "/tmp", &l) >= 0);
 437         assert_se(get_files_in_directory(".", &t) >= 0);
 438         assert_se(get_files_in_directory(".", NULL) >= 0);
 439 }
 440
 441 static void test_var_tmp(void) {
 442         _cleanup_free_ char *tmpdir_backup = NULL, *temp_backup = NULL, *tmp_backup = NULL;
 443         const char *tmp_dir = NULL, *t;
 444
 445         log_info("/* %s */", __func__);
 446
 447         t = getenv("TMPDIR");
 448         if (t) {
 449                 tmpdir_backup = strdup(t);
 450                 assert_se(tmpdir_backup);
 451         }
 452
 453         t = getenv("TEMP");
 454         if (t) {
 455                 temp_backup = strdup(t);
 456                 assert_se(temp_backup);
 457         }
 458
 459         t = getenv("TMP");
 460         if (t) {
 461                 tmp_backup = strdup(t);
 462                 assert_se(tmp_backup);
 463         }
 464
 465         assert_se(unsetenv("TMPDIR") >= 0);
 466         assert_se(unsetenv("TEMP") >= 0);
 467         assert_se(unsetenv("TMP") >= 0);
 468
 469         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 470         assert_se(streq(tmp_dir, "/var/tmp"));
 471
 472         assert_se(setenv("TMPDIR", "/tmp", true) >= 0);
 473         assert_se(streq(getenv("TMPDIR"), "/tmp"));
 474
 475         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 476         assert_se(streq(tmp_dir, "/tmp"));
 477
 478         assert_se(setenv("TMPDIR", "/88_does_not_exist_88", true) >= 0);
 479         assert_se(streq(getenv("TMPDIR"), "/88_does_not_exist_88"));
 480
 481         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 482         assert_se(streq(tmp_dir, "/var/tmp"));
 483
 484         if (tmpdir_backup)  {
 485                 assert_se(setenv("TMPDIR", tmpdir_backup, true) >= 0);
 486                 assert_se(streq(getenv("TMPDIR"), tmpdir_backup));
 487         }
 488
 489         if (temp_backup)  {
 490                 assert_se(setenv("TEMP", temp_backup, true) >= 0);
 491                 assert_se(streq(getenv("TEMP"), temp_backup));
 492         }
 493
 494         if (tmp_backup)  {
 495                 assert_se(setenv("TMP", tmp_backup, true) >= 0);
 496                 assert_se(streq(getenv("TMP"), tmp_backup));
 497         }
 498 }
 499
 500 static void test_dot_or_dot_dot(void) {
 501         log_info("/* %s */", __func__);
 502
 503         assert_se(!dot_or_dot_dot(NULL));
 504         assert_se(!dot_or_dot_dot(""));
 505         assert_se(!dot_or_dot_dot("xxx"));
 506         assert_se(dot_or_dot_dot("."));
 507         assert_se(dot_or_dot_dot(".."));
 508         assert_se(!dot_or_dot_dot(".foo"));
 509         assert_se(!dot_or_dot_dot("..foo"));
 510 }
 511
 512 static void test_access_fd(void) {
 513         _cleanup_(rmdir_and_freep) char *p = NULL;
 514         _cleanup_close_ int fd = -1;
 515         const char *a;
 516
 517         log_info("/* %s */", __func__);
 518
 519         a = strjoina(arg_test_dir ?: "/tmp", "/access-fd.XXXXXX");
 520         assert_se(mkdtemp_malloc(a, &p) >= 0);
 521
 522         fd = open(p, O_RDONLY|O_DIRECTORY|O_CLOEXEC);
 523         assert_se(fd >= 0);
 524
 525         assert_se(access_fd(fd, R_OK) >= 0);
 526         assert_se(access_fd(fd, F_OK) >= 0);
 527         assert_se(access_fd(fd, W_OK) >= 0);
 528
 529         assert_se(fchmod(fd, 0000) >= 0);
 530
 531         assert_se(access_fd(fd, F_OK) >= 0);
 532
 533         if (geteuid() == 0) {
 534                 assert_se(access_fd(fd, R_OK) >= 0);
 535                 assert_se(access_fd(fd, W_OK) >= 0);
 536         } else {
 537                 assert_se(access_fd(fd, R_OK) == -EACCES);
 538                 assert_se(access_fd(fd, W_OK) == -EACCES);
 539         }
 540 }
 541
 542 static void test_touch_file(void) {
 543         uid_t test_uid, test_gid;
 544         _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
 545         struct stat st;
 546         const char *a;
 547         usec_t test_mtime;
 548         int r;
 549
 550         log_info("/* %s */", __func__);
 551
 552         test_uid = geteuid() == 0 ? 65534 : getuid();
 553         test_gid = geteuid() == 0 ? 65534 : getgid();
 554
 555         test_mtime = usec_sub_unsigned(now(CLOCK_REALTIME), USEC_PER_WEEK);
 556
 557         a = strjoina(arg_test_dir ?: "/dev/shm", "/touch-file-XXXXXX");
 558         assert_se(mkdtemp_malloc(a, &p) >= 0);
 559
 560         a = strjoina(p, "/regular");
 561         r = touch_file(a, false, test_mtime, test_uid, test_gid, 0640);
 562         if (r < 0) {
 563                 assert_se(IN_SET(r, -EINVAL, -ENOSYS, -ENOTTY, -EPERM));
 564                 log_tests_skipped_errno(errno, "touch_file() not possible");
 565                 return;
 566         }
 567
 568         assert_se(lstat(a, &st) >= 0);
 569         assert_se(st.st_uid == test_uid);
 570         assert_se(st.st_gid == test_gid);
 571         assert_se(S_ISREG(st.st_mode));
 572         assert_se((st.st_mode & 0777) == 0640);
 573         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 574
 575         a = strjoina(p, "/dir");
 576         assert_se(mkdir(a, 0775) >= 0);
 577         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 578         assert_se(lstat(a, &st) >= 0);
 579         assert_se(st.st_uid == test_uid);
 580         assert_se(st.st_gid == test_gid);
 581         assert_se(S_ISDIR(st.st_mode));
 582         assert_se((st.st_mode & 0777) == 0640);
 583         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 584
 585         a = strjoina(p, "/fifo");
 586         assert_se(mkfifo(a, 0775) >= 0);
 587         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 588         assert_se(lstat(a, &st) >= 0);
 589         assert_se(st.st_uid == test_uid);
 590         assert_se(st.st_gid == test_gid);
 591         assert_se(S_ISFIFO(st.st_mode));
 592         assert_se((st.st_mode & 0777) == 0640);
 593         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 594
 595         a = strjoina(p, "/sock");
 596         assert_se(mknod(a, 0775 | S_IFSOCK, 0) >= 0);
 597         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 598         assert_se(lstat(a, &st) >= 0);
 599         assert_se(st.st_uid == test_uid);
 600         assert_se(st.st_gid == test_gid);
 601         assert_se(S_ISSOCK(st.st_mode));
 602         assert_se((st.st_mode & 0777) == 0640);
 603         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 604
 605         if (geteuid() == 0) {
 606                 a = strjoina(p, "/cdev");
 607                 r = mknod(a, 0775 | S_IFCHR, makedev(0, 0));
 608                 if (r < 0 && errno == EPERM && detect_container() > 0) {
 609                         log_notice("Running in unprivileged container? Skipping remaining tests in %s", __func__);
 610                         return;
 611                 }
 612                 assert_se(r >= 0);
 613                 assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 614                 assert_se(lstat(a, &st) >= 0);
 615                 assert_se(st.st_uid == test_uid);
 616                 assert_se(st.st_gid == test_gid);
 617                 assert_se(S_ISCHR(st.st_mode));
 618                 assert_se((st.st_mode & 0777) == 0640);
 619                 assert_se(timespec_load(&st.st_mtim) == test_mtime);
 620
 621                 a = strjoina(p, "/bdev");
 622                 assert_se(mknod(a, 0775 | S_IFBLK, makedev(0, 0)) >= 0);
 623                 assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 624                 assert_se(lstat(a, &st) >= 0);
 625                 assert_se(st.st_uid == test_uid);
 626                 assert_se(st.st_gid == test_gid);
 627                 assert_se(S_ISBLK(st.st_mode));
 628                 assert_se((st.st_mode & 0777) == 0640);
 629                 assert_se(timespec_load(&st.st_mtim) == test_mtime);
 630         }
 631
 632         a = strjoina(p, "/lnk");
 633         assert_se(symlink("target", a) >= 0);
 634         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 635         assert_se(lstat(a, &st) >= 0);
 636         assert_se(st.st_uid == test_uid);
 637         assert_se(st.st_gid == test_gid);
 638         assert_se(S_ISLNK(st.st_mode));
 639         assert_se((st.st_mode & 0777) == 0640);
 640         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 641 }
 642
 643 static void test_unlinkat_deallocate(void) {
 644         _cleanup_free_ char *p = NULL;
 645         _cleanup_close_ int fd = -1;
 646         struct stat st;
 647
 648         log_info("/* %s */", __func__);
 649
 650         assert_se(tempfn_random_child(arg_test_dir, "unlink-deallocation", &p) >= 0);
 651
 652         fd = open(p, O_WRONLY|O_CLOEXEC|O_CREAT|O_EXCL, 0600);
 653         assert_se(fd >= 0);
 654
 655         assert_se(write(fd, "hallo\n", 6) == 6);
 656
 657         assert_se(fstat(fd, &st) >= 0);
 658         assert_se(st.st_size == 6);
 659         assert_se(st.st_blocks > 0);
 660         assert_se(st.st_nlink == 1);
 661
 662         assert_se(unlinkat_deallocate(AT_FDCWD, p, 0) >= 0);
 663
 664         assert_se(fstat(fd, &st) >= 0);
 665         assert_se(IN_SET(st.st_size, 0, 6)); /* depending on whether hole punching worked the size will be 6
 666                                                 (it worked) or 0 (we had to resort to truncation) */
 667         assert_se(st.st_blocks == 0);
 668         assert_se(st.st_nlink == 0);
 669 }
 670
 671 static void test_fsync_directory_of_file(void) {
 672         _cleanup_close_ int fd = -1;
 673
 674         log_info("/* %s */", __func__);
 675
 676         fd = open_tmpfile_unlinkable(arg_test_dir, O_RDWR);
 677         assert_se(fd >= 0);
 678
 679         assert_se(fsync_directory_of_file(fd) >= 0);
 680 }
 681
 682 static void test_rename_noreplace(void) {
 683         static const char* const table[] = {
 684                 "/reg",
 685                 "/dir",
 686                 "/fifo",
 687                 "/socket",
 688                 "/symlink",
 689                 NULL
 690         };
 691
 692         _cleanup_(rm_rf_physical_and_freep) char *z = NULL;
 693         const char *j = NULL;
 694         char **a, **b;
 695
 696         log_info("/* %s */", __func__);
 697
 698         if (arg_test_dir)
 699                 j = strjoina(arg_test_dir, "/testXXXXXX");
 700         assert_se(mkdtemp_malloc(j, &z) >= 0);
 701
 702         j = strjoina(z, table[0]);
 703         assert_se(touch(j) >= 0);
 704
 705         j = strjoina(z, table[1]);
 706         assert_se(mkdir(j, 0777) >= 0);
 707
 708         j = strjoina(z, table[2]);
 709         (void) mkfifo(j, 0777);
 710
 711         j = strjoina(z, table[3]);
 712         (void) mknod(j, S_IFSOCK | 0777, 0);
 713
 714         j = strjoina(z, table[4]);
 715         (void) symlink("foobar", j);
 716
 717         STRV_FOREACH(a, (char**) table) {
 718                 _cleanup_free_ char *x = NULL, *y = NULL;
 719
 720                 x = strjoin(z, *a);
 721                 assert_se(x);
 722
 723                 if (access(x, F_OK) < 0) {
 724                         assert_se(errno == ENOENT);
 725                         continue;
 726                 }
 727
 728                 STRV_FOREACH(b, (char**) table) {
 729                         _cleanup_free_ char *w = NULL;
 730
 731                         w = strjoin(w, *b);
 732                         assert_se(w);
 733
 734                         if (access(w, F_OK) < 0) {
 735                                 assert_se(errno == ENOENT);
 736                                 continue;
 737                         }
 738
 739                         assert_se(rename_noreplace(AT_FDCWD, w, AT_FDCWD, y) == -EEXIST);
 740                 }
 741
 742                 y = strjoin(z, "/somethingelse");
 743                 assert_se(y);
 744
 745                 assert_se(rename_noreplace(AT_FDCWD, x, AT_FDCWD, y) >= 0);
 746                 assert_se(rename_noreplace(AT_FDCWD, y, AT_FDCWD, x) >= 0);
 747         }
 748 }
 749
 750 static void test_chmod_and_chown(void) {
 751         _cleanup_(rm_rf_physical_and_freep) char *d = NULL;
 752         _unused_ _cleanup_umask_ mode_t u = umask(0000);
 753         struct stat st;
 754         const char *p;
 755
 756         if (geteuid() != 0)
 757                 return;
 758
 759         log_info("/* %s */", __func__);
 760
 761         assert_se(mkdtemp_malloc(NULL, &d) >= 0);
 762
 763         p = strjoina(d, "/reg");
 764         assert_se(mknod(p, S_IFREG | 0123, 0) >= 0);
 765
 766         assert_se(chmod_and_chown(p, S_IFREG | 0321, 1, 2) >= 0);
 767         assert_se(chmod_and_chown(p, S_IFDIR | 0555, 3, 4) == -EINVAL);
 768
 769         assert_se(lstat(p, &st) >= 0);
 770         assert_se(S_ISREG(st.st_mode));
 771         assert_se((st.st_mode & 07777) == 0321);
 772
 773         p = strjoina(d, "/dir");
 774         assert_se(mkdir(p, 0123) >= 0);
 775
 776         assert_se(chmod_and_chown(p, S_IFDIR | 0321, 1, 2) >= 0);
 777         assert_se(chmod_and_chown(p, S_IFREG | 0555, 3, 4) == -EINVAL);
 778
 779         assert_se(lstat(p, &st) >= 0);
 780         assert_se(S_ISDIR(st.st_mode));
 781         assert_se((st.st_mode & 07777) == 0321);
 782
 783         p = strjoina(d, "/lnk");
 784         assert_se(symlink("idontexist", p) >= 0);
 785
 786         assert_se(chmod_and_chown(p, S_IFLNK | 0321, 1, 2) >= 0);
 787         assert_se(chmod_and_chown(p, S_IFREG | 0555, 3, 4) == -EINVAL);
 788         assert_se(chmod_and_chown(p, S_IFDIR | 0555, 3, 4) == -EINVAL);
 789
 790         assert_se(lstat(p, &st) >= 0);
 791         assert_se(S_ISLNK(st.st_mode));
 792 }
 793
 794 int main(int argc, char *argv[]) {
 795         test_setup_logging(LOG_INFO);
 796
 797         arg_test_dir = argv[1];
 798
 799         test_unlink_noerrno();
 800         test_get_files_in_directory();
 801         test_readlink_and_make_absolute();
 802         test_var_tmp();
 803         test_chase_symlinks();
 804         test_dot_or_dot_dot();
 805         test_access_fd();
 806         test_touch_file();
 807         test_unlinkat_deallocate();
 808         test_fsync_directory_of_file();
 809         test_rename_noreplace();
 810         test_chmod_and_chown();
 811
 812         return 0;
 813 }